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Nexperia USA Inc. 74HC166PW-Q100J
- Part No.:
- 74HC166PW-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74HC166PW-Q100J.pdf
- Description:
- IC SHIFT REGISTER 8BIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
74HC166PW-Q100 from Nexperia is an AEC-Q100 Grade 1 qualified 8-bit parallel-in/serial-out shift register with CMOS logic levels, 2.0 V to 6.0 V supply range, -40 °C to +125 °C operation, and synchronous parallel load via active-low PE input. It serves as a serial data expander in automotive body control modules for LED driver interface consolidation.
For engineers reviewing the 74HC166PW-Q100 datasheet, 74HC166PW-Q100 pinout, 74HC166PW-Q100 application, or 74HC166PW-Q100 equivalent, key selection criteria include its asynchronous master reset (MR), clock enable (CE) control, propagation delay of 14 ns at 6.0 V, TSSOP16 package thermal performance, and compatibility with 5 V TTL-level systems when paired with 74HCT166 variants.
Technical Context
This device implements an 8-stage synchronous shift register with dual-path data loading: parallel load occurs on the rising edge of CP when PE is LOW; serial shift occurs on each CP rising edge when PE is HIGH and CE is LOW. The MR input asynchronously clears all stages to LOW regardless of CP state.
Its CMOS input structure includes clamp diodes enabling safe interfacing to voltages exceeding VCC using current-limiting resistors, and it supports both static latching (via hold mode) and dynamic expansion across multiple cascaded units using Q7-to-DS daisy-chaining.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit parallel-in/serial-out shift register with asynchronous reset and clock enable |
| Supply Voltage Range | 2.0 V to 6.0 V - enables direct interface with 3.3 V microcontrollers and legacy 5 V automotive subsystems |
| Operating Temperature | -40 °C to +125 °C - validated for under-hood automotive environments per AEC-Q100 Grade 1 |
| Propagation Delay (CP to Q7) | 14 ns (typ) at VCC = 6.0 V - supports >24 MHz serial throughput in high-speed control loops |
| Input Logic Level | CMOS-compatible - VIH = 4.2 V, VIL = 1.8 V at VCC = 6.0 V; eliminates level-shifter requirement in pure CMOS systems |
| Power Dissipation | ICC ≤ 160 μA (max) at VCC = 6.0 V, -40 °C to +125 °C - enables low-quiescent-current designs in always-on vehicle networks |
| ESD Robustness | HBM > 2000 V, CDM > 1000 V - withstands handling and assembly stresses in automotive manufacturing lines |
Pinout & Package
TSSOP16 plastic thin shrink small outline package (SOT403-1); 16-pin, 4.4 mm body width, 0.65 mm pitch; optimized for automated optical inspection and high-density PCB layouts in automotive ECUs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DS) | Serial Data Input | Accepts serial bit stream during shift mode; tied to Q7 of upstream device for daisy-chain expansion |
| 2–5, 10–12, 14 (D0–D7) | Parallel Data Inputs | Load 8-bit parallel word synchronously on CP rising edge when PE = LOW; supports GPIO expansion from MCU ports |
| 6 (CE) | Clock Enable (active LOW) | Disables CP input when HIGH - prevents unintended shifts during bus arbitration or debug pauses |
| 7 (CP) | Clock Input (rising-edge triggered) | Edge-sensitive control for both parallel load and serial shift; requires clean <20 ns rise/fall times at 6 V |
| 8 (GND) | Ground Reference | 0 V return path for all internal logic and output drivers; must be low-impedance to minimize ground bounce |
| 9 (MR) | Master Reset (active LOW) | Asynchronously clears all 8 flip-flops to LOW; used for power-on initialization or fault recovery |
| 13 (Q7) | Serial Output | LSB-serial output from final stage; drives DS of next device or microcontroller UART RX line |
| 15 (PE) | Parallel Enable (active LOW) | Selects parallel load mode (PE = LOW) vs. serial shift mode (PE = HIGH); enables mode switching without reset |
| 16 (VCC) | Positive Supply | Primary power rail; decoupling capacitor (100 nF ceramic) required within 5 mm of pin for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40 °C to +125 °C ambient, including temperature cycling and humidity testing |
| Synchronous parallel load with edge-triggered clock | Enables deterministic timing alignment between MCU write and register update - no metastability risk |
| Asynchronous master reset (MR) | Guarantees known initial state independent of clock phase - critical for fail-safe ECU boot sequences |
| Clamp diode-equipped inputs | Permits direct connection to 12 V sensor signals using external current-limiting resistors, reducing BOM count |
| Low dynamic power consumption | CPD = 41 pF enables <100 μW dynamic dissipation at 1 MHz - extends battery life in sleep-mode nodes |
Applications
| Automotive Body Control Unit (BCU) | LED Driver Interface Expansion |
|---|---|
Use Scenario: Consolidating 32-channel LED dimming control from an 8-bit MCU port into a single CAN-linked BCU. IC Role / Device Role / Timing Role: Parallel-load shift register acting as I/O extender; accepts 8-bit command words from MCU every 5 ms and serially clocks them to downstream LED drivers. Use Value: Reduces MCU GPIO usage by 8× while maintaining deterministic 5 ms update latency via synchronized CP edges. |
Use Scenario: Driving 24-segment dashboard backlight using cascaded shift registers controlled by a low-pin-count microcontroller. IC Role / Device Role / Timing Role: Serial-output stage in daisy-chained configuration; Q7 feeds DS of next 74HC166PW-Q100 to extend total bits to 24. Use Value: Enables full 24-bit brightness control with only 3 MCU pins (CP, PE, DS) and no additional level shifters or buffers. |
| Engine Control Module (ECM) Diagnostic Interface | Automotive HVAC Panel Controller |
Use Scenario: Reading 16 discrete diagnostic switch inputs (e.g., service mode selectors, calibration jumpers) in an ECM housing. IC Role / Device Role / Timing Role: Parallel-input shift register capturing switch states; MR ensures clean startup state before first read cycle. Use Value: Eliminates need for 16 dedicated MCU interrupt-capable pins; supports hot-plug detection via periodic parallel reads. |
Use Scenario: Scanning 12 tactile button inputs and driving 8 status LEDs on a climate control panel with limited MCU resources. IC Role / Device Role / Timing Role: Bidirectional shift register node - D0–D7 read buttons, Q7 drives LED chain; PE toggled per scan cycle. Use Value: Achieves full 12-button + 8-LED interface using only 4 MCU pins and one IC, meeting ASIL-B functional safety timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit parallel-in/serial-out shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT166PW-Q100 | TTL-compatible inputs (VIH = 2.0 V min at 4.5 V); identical pinout and function | Better interoperability with legacy 5 V TTL logic; slightly higher ICC at 5 V | Select when interfacing directly to 5 V microcontrollers or op-amps without level translation |
| SN74LV165APWR | 3.3 V only (1.65–5.5 V), different pinout (Q7 not on pin 13), no MR pin | Lacks asynchronous reset and automotive qualification; lower propagation delay (6.5 ns typ) | Use only in non-automotive, 3.3 V-only systems where MR is managed externally |
Compared with 74HCT166PW-Q100, the 74HC166PW-Q100 offers lower static current and wider VCC range but requires CMOS-level drive; versus SN74LV165APWR, it provides AEC-Q100 compliance and MR functionality essential for automotive reset integrity.
Availability
74HC166PW-Q100 is available at Aetrix Electronics and suitable for automotive body control units, LED driver interfaces, engine diagnostic subsystems, and HVAC panel controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74HC166PW-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on automotive, industrial, and mobile markets.
The 74HC166-Q100 belongs to Nexperia's automotive-qualified logic portfolio, designed specifically for robust serial data expansion in harsh-temperature electronic control units where reliability and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum clock frequency supported by the 74HC166PW-Q100 at 5.0 V?
At VCC = 5.0 V and CL = 15 pF, the 74HC166PW-Q100 achieves a maximum clock frequency of 63 MHz (typical) as specified in Table 7. This value assumes ideal signal integrity and minimal capacitive loading; real-world operation in automotive harnesses typically limits practical use to ≤25 MHz due to EMI filtering and trace inductance.
Can the 74HC166PW-Q100 be operated with a 3.3 V supply in automotive applications?
Yes - the 74HC166PW-Q100 is fully specified from 2.0 V to 6.0 V and qualified for -40 °C to +125 °C operation. At 3.3 V, VIH = 2.31 V (min) and VIL = 1.32 V (max), ensuring reliable interfacing with standard 3.3 V MCUs and peripherals in automotive domains.
How does the CE (clock enable) pin affect timing behavior?
When CE is HIGH, the CP input is disabled - no clock edges propagate through the register, preventing unintended shifts or loads. This allows precise gating of data movement without altering CP waveform timing, supporting multi-drop bus arbitration and debug pause modes in real-time control systems.
Is the MR (master reset) pin synchronous or asynchronous?
The MR pin is asynchronous and active LOW: asserting MR immediately forces all eight internal flip-flops to logic LOW, independent of CP state or timing. This guarantees deterministic initialization during power-up or fault recovery, satisfying ISO 26262 ASIL-B requirements for predictable reset behavior.
74HC166PW-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Push-Pull
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Parallel or Serial to Serial
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74HC166PW-Q100J FAQ
1.How can I place an order for 74HC166PW-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC166PW-Q100J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74HC166PW-Q100J reliable?
The price and inventory of 74HC166PW-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC166PW-Q100J is usually 5 days.
3.What payment methods are accepted for 74HC166PW-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC166PW-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC166PW-Q100J?
74HC166PW-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC166PW-Q100J order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74HC166PW-Q100J?
For technical support, including 74HC166PW-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC166PW-Q100J requirements.
6.How does Aetrix verify that 74HC166PW-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HC166PW-Q100J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HC166PW-Q100J meets industry standards.
7.What is the process for return or replacement of 74HC166PW-Q100J?
All 74HC166PW-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HC166PW-Q100J, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74HC166PW-Q100J part is unused and in its original packaging.
Return procedure for 74HC166PW-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HC166PW-Q100J Tags
-
SN74HC164DR
Texas Instruments
-
SN74HC595DR
Texas Instruments
-
74HC595PW,118
Nexperia USA Inc.
-
SN74HC165PWR
Texas Instruments
-
HEF4094BT,653
Nexperia USA Inc.
-
74HC595D,118
Nexperia USA Inc.
-
SN74HC595PWR
Texas Instruments
-
74HC165D,653
Nexperia USA Inc.
-
SN74LV165APWR
Texas Instruments
-
74HC595BQ,115
Nexperia USA Inc.
-
74HC165BQ,115
Nexperia USA Inc.
-
CD4094BPWR
Texas Instruments
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